Toothbrush



FIG. 1 is a right side view of a toothbrush, showing my new design, the left side view being a mirror image;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a perspective view thereof; and,

FIG. 4 shows a rear view thereof. 

The ornamental design for a toothbrush, as shown and described. 